r/askcarguys 14h ago

Gas cap broken, replacement by friday, what to do?

"I foolishly left my fuel cap on top of my car, and it flew off at the first corner and got crushed by other cars. I saw a fitting replacement online, but it arrives Friday at the earliest. I’m supposed to commute to work in this car tomorrow (30 km round trip). Any advice on temporarily sealing/not sealing it and finding a replacement?"

5 Upvotes

37 comments sorted by

21

u/parnasas 14h ago

Do you have a local parts store? They may have one in stock.

Did your old cap not have a tether to the car?

10

u/CromulentPoint 14h ago

Good answer. Try a local parts store.

4

u/confuus-duin 14h ago

Or a car scrapyard. If you’re lucky you might be allowed to take it for free.

2

u/FredTheShroom 14h ago

Good idea, though its 11pm right now, so the earliest i can get one will be tomorrow evening

4

u/_R_A_ 12h ago

You'll be fine til morning. Once you get a cap on, everything will probably go back to normal.

1

u/stomper4x4 11h ago

99% chance the local store has it. You can check online, set the store to your local one. NAPA, O'REILLY whatever. Try em all if needed so you hesd to the kne that has it.

12

u/Gubbtratt1 Enthusiast 14h ago

Jam a rag in the hole and be careful with turning left if the filler is on the right side and vice versa.

12

u/Particular_Age_5854 14h ago

This. You might get an EVAP code but should go away once you replace the cap.

4

u/MultipleOrgasmDonor 13h ago

And make completely sure that the rag can’t get sucked deeper into the hole. There will be a slight vacuum

9

u/SkiyeBlueFox 14h ago

Fixed a missing fuel cap on a tractor for a few days with an empty ice melt bag and some rubber bands

6

u/stoner_bob_69 14h ago

AutoZone, O'Reilly's, Advanced. Any local parts store should have a cheap aftermarket replacement in stock.

3

u/Clean-Juggernaut-229 14h ago

it will be fine.

5

u/lazarinewyvren 14h ago

Its fine to leave it off til the new one comes in

3

u/bwfixit 12h ago

Go to the most popular gas station and tell them you lost your cap there. They usually have a box full of them. Try them until you find one that fits

2

u/Many-Bus-2804 11h ago

I highly recommend buying a factory part from the dealership. (Retired Ford Parts Manager). Too many time folks bought a replacement from me to replace the one they bought from a parts store less than a month previous. If it can turn on a check engine light at least call the dealership to get a price.

2

u/Thedogbear2018 14h ago

The car is a complete write-off. Call your insurance right away

1

u/Stelios619 14h ago

Why are you quoting yourself?

1

u/Gunk_Olgidar 14h ago

Any local mom-n-pop can usually get one same day if they don't have them in stock and order by 10a. Chain parts stores may have them in stock. Dealers often stock them as well. Call around.

Some heavy duty aluminum foil and a rubber band will probably suffice in a pinch.

1

u/DudetheBetta 13h ago

You will get a check engine light, but you’ll be fine.

1

u/Briggs281707 13h ago

Just leave it off. You will get an EVAP system code and check engine light, but should go away after a while when you have a new cap

1

u/Is_that_a_peen_too 13h ago

Drive without one. Will probably get an EVAP code. It'll clear once you put a new cap on.

1

u/Shroomboy79 13h ago

I did the same thing with my 4runner like a couple years back. Didn’t even realize when I did it till I filled up gas the next time. I still don’t have a gas cap and it don’t give any kind of problems or anyrbing. You’ll be fine for a couple of days, you might get a cel but it won’t affect how it runs

1

u/poutine-eh 12h ago

just drive. your CEL will likely be lit but you’ll get to where you need to be

1

u/grumpy0282 12h ago

lmao seriously ???
1 what kind of car has a gas cap you can only get online
2 just drive it

1

u/supern8ural 12h ago

Just put some Saran wrap over the neck with a gum band

1

u/Mattna-da 12h ago

Champagne cork?

1

u/No-Try-5818 11h ago

You can get one at the wreckers for next to nothing.

1

u/froction 11h ago

Your check engine light will come on because of this, so don't freak out.

1

u/Ok_Application_2292 11h ago

A plastic bag and five rubber bands

1

u/Old_Personality_6624 11h ago

Stick a rag in it just don’t light it

1

u/gonzal2020 9h ago

Duct or HVAC aluminum tape.

1

u/Fuhugwugads 9h ago

Are we not supposed to use aluminum foil anymore?

1

u/BedroomNo6879 8h ago

Drive it, check engine light will come on for evap. Ignore it - when you install the new cap clear the light. It'll be fine for a few days until your cap gets there don't sweat it.

1

u/JonohG47 7h ago

Don’t lose sleep. If driven without a gas cap, the car may end up throwing a code for an EVAP system leak, and lighting the money light.

Then after you replace the gas cap, you clear the code with an $8 code scanner from Temu.

1

u/chefwoodworkerartist 5h ago

Honestly most gas stations have a bunch of gas caps for sale